Abstract
We propose and numerically investigate a tunable metasurface made of an array of graphene ribbons to dynamically control terahertz (THz) wavefront. The metasurface consists of graphene micro ribbons on a silver mirror with a SiO2 gap layer. The graphene ribbons are designed to exhibit localized plasmon resonances depending on their Fermi levels to introduce abrupt phase shifts along the metasurface. With interference of the Fabry-Perot resonances in the SiO2 layer, phase shift through the system is largely accumulated, covering up to 2jt range for full control of the THz wavefront. Numerical simulations prove that wide-angle reflected THz beam steering from -53° to +53° with a high reflection efficiency as high as 60% is achieved at 5 THz while the propagation direction of THz beam could be switched within 0.6 ps.
| Original language | English |
|---|---|
| Title of host publication | Light-Matter Phenomena - From Atoms to Complex Structures |
| Publisher | Chinese Materials Research Society |
| Pages | 37-42 |
| Number of pages | 6 |
| Volume | 1788 |
| ISBN (Electronic) | 9781510826427 |
| DOIs | |
| Publication status | Published - 2015 |
| Event | 2015 MRS Spring Meeting - San Francisco, United States Duration: Apr 6 2015 → Apr 10 2015 |
Conference
| Conference | 2015 MRS Spring Meeting |
|---|---|
| Country | United States |
| City | San Francisco |
| Period | 4/6/15 → 4/10/15 |
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ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
Cite this
Terahertz wavefront control by graphene metasurface. / Yatooshi, Takumi; Ishikawa, Atsushi; Tsuruta, Kenji.
Light-Matter Phenomena - From Atoms to Complex Structures. Vol. 1788 Chinese Materials Research Society, 2015. p. 37-42.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Terahertz wavefront control by graphene metasurface
AU - Yatooshi, Takumi
AU - Ishikawa, Atsushi
AU - Tsuruta, Kenji
PY - 2015
Y1 - 2015
N2 - We propose and numerically investigate a tunable metasurface made of an array of graphene ribbons to dynamically control terahertz (THz) wavefront. The metasurface consists of graphene micro ribbons on a silver mirror with a SiO2 gap layer. The graphene ribbons are designed to exhibit localized plasmon resonances depending on their Fermi levels to introduce abrupt phase shifts along the metasurface. With interference of the Fabry-Perot resonances in the SiO2 layer, phase shift through the system is largely accumulated, covering up to 2jt range for full control of the THz wavefront. Numerical simulations prove that wide-angle reflected THz beam steering from -53° to +53° with a high reflection efficiency as high as 60% is achieved at 5 THz while the propagation direction of THz beam could be switched within 0.6 ps.
AB - We propose and numerically investigate a tunable metasurface made of an array of graphene ribbons to dynamically control terahertz (THz) wavefront. The metasurface consists of graphene micro ribbons on a silver mirror with a SiO2 gap layer. The graphene ribbons are designed to exhibit localized plasmon resonances depending on their Fermi levels to introduce abrupt phase shifts along the metasurface. With interference of the Fabry-Perot resonances in the SiO2 layer, phase shift through the system is largely accumulated, covering up to 2jt range for full control of the THz wavefront. Numerical simulations prove that wide-angle reflected THz beam steering from -53° to +53° with a high reflection efficiency as high as 60% is achieved at 5 THz while the propagation direction of THz beam could be switched within 0.6 ps.
UR - http://www.scopus.com/inward/record.url?scp=84985990683&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84985990683&partnerID=8YFLogxK
U2 - 10.1557/opl.2015.730
DO - 10.1557/opl.2015.730
M3 - Conference contribution
AN - SCOPUS:84985990683
VL - 1788
SP - 37
EP - 42
BT - Light-Matter Phenomena - From Atoms to Complex Structures
PB - Chinese Materials Research Society
ER -